Ophthalmic mounting



'Sept."2l 1926. 1,600,606

F. A. STEVENS OPHTHALMIC MOUNTING Filed Sept. 2 1924 Invmjor Red ear $07519. @teoena dtjoi-rpey Patented Sept. 21, 1926. g I

UNITED STATES PATENTOFFICE.)

FREDERICK ARTHUR STEVENS, OF PROVIDENCE, RHODE ISLAND, ASSIGN QR TO BAUSGH AND LOMB' OPTICAL COMPANY, OF ROCHESTER, NEW YORK, .A. CORPORA- TION OF NEW YORK.

OPHTHALMIC MOUNTING.

Application filed September 2, 1924. Serial No. 735,237.

The present invention relates to ophthalat the open sideof the groove to prevent the mic mountingscomprising endless lens-holdlens falling out of the groove. In thepre- 55 ing rims, and more particularly to mountferre'd construction, one clip is provided ings of the all-shell type, constituted of near the temple end piece, and another near non-metal material, like celluloid, zylonite the bridge, though the number, the location and the like and the dimension of theclips may be varied As the non-metal material, though more as desired. When integral clips are em 0 or less resilient, is notsufliciently so to perployed, it is necessary to move one or more mit mounting lenses within the endless rims of them temporarily aside to permit insert 10 at ordinary temperatures, it is necessary to mg the lens. This maybe effected by temapply heat, which permits of stretching or porarily bending or springing back the porexpanding the rims to increase temporarily tion of the rim near the temple end piece, 65 their calibre. This is a drawback, for beor the bridge end piece, ali ttle out of its sides the inconvenience attending the heat plane. The, bendingtor springing'is renapplication, the mounting may become disdered possible by the resilient character of tor-ted in consequence; in fact, it frequently the material of which the mounting is concracks as a result. Stitutedi i 70 Endless nonsmetal rims have been hereto- According to the present invention, the fore proposed, so: constructed as to permit said other side of the lens-receiving groove,

lenses to be inserted within them by tempothough cut away, or open, is not completely rarily springing back resilient segmental so. members that are allowed to return by their The invention will be described in connec- 7 resiliency into their normal places after the tion with the accompanying drawings, in lens has been forced. into its seat. The temwhich Fig. 1 is a rear elevation or a portion porary springing back of the segmental of a spectacle mounting constructed accordmembers serves to increase for the moment ing to a preferred. embodimentof the presthe calibre of the groove, permitting entry ent invention; Fig. 2 is a section taken upon 80 of the lens. Owing to the resilient nature the line 2-2 of Fig. 1,.looking in the direeof the segmental members, however, they can tion 013 the arrows, and Fig. 8 is a section 2 not'hold the lens tightly in place, so that taken upon the line 3-3 of Fig. 1, illusadditional metal clamping members have trating the act of insertinga lens in its lens been needed to clamp the non-metalv rim groove. I 5 against the lens,'and thereby prevent acc1- Ophthalmic mountings of the above-dedental rotation of the lens within its seat. scr bed character, constituted of non-metal In acopending application, Serial No. material, like celluloid, zylonite and the like,

479,480, filed June 22, 1921, of which the comprise two endlessrims 2 integrally con- 7 present application is a continuation in part, nect-ed together by a bridge l, and each havand which has maturedv into Patent No. ing integral temple end pieces 14:. The 1,520,977, December 30, 1924, there is disbridge and the end pieces need. not, however 40 closed and claimed an ophthalmic mounting be integral. They may be made of metal or within the endless rims or which lenses may other material and they may be attached to be tightly, non-rotatably mounted without the rims in any well-known manner. I

the necessity of previously expanding or The lens-receiving grooves described and stretching the non-metal material. The claimed in the aforesaid application are each 4 lens-receiving grooves are each provided, on provided onone side with a wall 8, against one side, with a wall against which the lens which the lens 6 isadapted to rest, the other is adapted to rest, the other side of the side of the groove being cut away, or open, 100.

groove being cut away, or open. This makes as shown at 10. This makes itpossible to it possible to insert within the groove, by insert within the groove, by way of the open 50 way oi the open side,a lens of diameter subside 10, a lens of diameter substantially stanti-a-lly equal to the calibre of the groove. equal to the calibre of the groove. 'One or Small clips, that. arepreferably integral more clips are provided at the opensid'e of with the body oi the mounting, are provided the groove to prevent the lens falling out I invent-ion.

' to permit inserting the lens.

of the groove. A clip 11 is shown provided near the temple end piece, and a clip 12 near the bridge, but it will be understood that the number, the location and the dimension of the clips be varied as desired- The clips are shown integral with the body of the mounting, but they may be separable and they may be constituted of metal or any other desired material. Separable clips may be preferred if the rims are made of metal, and the use of such is considered to be within the scope of the present When separable clips are em.- ployed, they may be removed, and replaced after the lens has become seated in its groove. If integral clips such as are shown are employed, it is necessary to move one or more of them, as the clip 12, temporarily aside This may be effected by temporarily bending or springing back the portion of the rim 2 near the bridge 4, for example, a little out of its plane, as is illustrated in Fig. 3. The bending or springing isrendered possible by the resilient character of the material of which the mounting is constituted. To supply the necessary leverage for the bending or springing action, the temple end piece and the bridge may be grasped, one in each hand, as is illustrated in F ig. 3. v

One side 19 of the lens is then placed in position between the other clip 11 and the portion of the wall 8 of the lens groove near the temple end piece 14, and the portion of the rim near the bridge 4 may be allowed to springer snap back into its plane, into position over the opposite side 17 of the lens, with the clip 12 over the edge 17 of the lens. The lens is thus readily and conveniently mounted within its groove, and is retained within its groove by the wall 8 en gaging one of its faces, and the clips engaging the other face.

As it is unnecessary to distort the rims by heat or otherwise, the .mounting will permanentlyretain its original shape, so that when a properly shaped lens is once properly fitted into a groove of proper size and shape, it will remain properly fitted, neither too loose nor too tight. The dangers of ac cidental axial derangement of the lens with in its groove, caused by the lens being too loose, and of the rim cracking, caused by the lens being too tight in its eliminated.

According to the present invention, the

side 10 of the lens-receiving groove is not completely cut away but is provided with a wall 21 of dimension such that the calibre of the groove at the side 10 is still larger than the smallest calibre of the wall 8, but not too small to permit entry of the lens. The lens is adapted to enter the groove by way of the wall 21 in the same manner as heretofore described. The walls 8 and 21 groove, are thus are preferably provided with a beveled groove between them, as shown more particularly in Fig. 2, which constitutes the lens-receiving groove and within which a beveled periphery of the lens is adapted to seat. These two walls 8 and 21 therefore act very much as do the prior-art walls of lens-receiving grooves, holding the lens in position bet-ween them, even without the aid of the clips 11 and 12. The construction is, however, an improvement on the prior art in that provision isthus made for snapping a lens into position without the aid of heat.

No lens-rotation-preventing means is necessary if the lens is properly fitted to the calibre of the rim, but a removable locking member 18 may be provided in registering notches of the lens groove and the lens to areventrotation of improperly fitted lenses, as described in a copending application, Serial No. 572,155, filed July 1, '1922which has matured into Patent No. 1,545,529, July 14, 1925.

It will be understood that the invention i not restricted to the exact embodiment thereof that is illustrated in the accompanymg drawings and described herein, and that all modifications within the skill of the artisan are considered to be within the spirit and scope of the present invention, as defined in the appended claims.

What is claimed is: a

1. An ophthalmic mounting comprising an endless zylonite rimhaving a lens-receiving groove of calibre substantially equal to the dimension of the lens, one side of the groove being cut away to permit-entry of the lens, the said side of the groove being provided with a wall to retain the lens within the groove.

2. An ophthalmic mounting comprising an endless zylonite rim having a lens-receiving groove provided on one side with a wall against which the lens is adapted to rest, the other side of the groove having a wall of larger calibre .than the calibre of the first-named wall, but of less calibre than the calibre of the groove, whereby a lens of dimension substantially equal to the calibre of the groove may be mounted in the groove by way of the wall of larger calibre, the lens being adapted to be retained within the groove between the two walls."

3. An ophthalmic mounting comprising an endless rim having a lens-receiving groove provided on one side with a wall against which the lens is adapted to rest, the other side of the groove having a wall of larger calibre than the calibre of the firstnamed wall but of less-calibre, than the calibre of the groove, and having one or more clips for retaining a lens within the groove, whereby a lens of dimension substantially equal to the calibre of the groovemay be mounted in the groove by way of the wall of larger calibre by temporarily bending the portion of the rim near a clip out of its plane.

4. An ophthalmic mounting comprising an endless rim constituted of non-metal material having a bridge and a temple end piece and a lens-receiving groove provided on one 7 side with a Wall against which the lens is adapted to rest, the other side of the groove having a Wall of larger calibre than the calibre of the first-named Wall but or" less calibre than the calibre ofthe groove to permit a lens of dimension substantially equal to the calibre of the groove to be mounted in the groove by Way of the Wall of larger calibre by grasping the bridge and the temple end piece, one in each hand, and temporarily bending the portion of the rim near the temple end piece out of its plane,

the said other side of. the groove having one or more clips for retaining the lens Within the groove.

5. An ophthalmic mounting comprising an endless zylonite rim having Walls on both sides of the groove provided With a lensrecciving groove, the Walls of the groove being or diii'erent calibre to permit a lens of dimension substantially equal to the calibre of the groove to be snapped into position Within the groove by Way of the side of larger calibre, the Wall of larger calibre being of less calibre than the calibre of the groove.

In testimony thereof, I have hereunto subscribed my name 1924.

FREDERICK A. STEVENS.

this 27th day of August, 

